Whoa!My Early 2011 MBP 17" had this three months ago! After graphical glitches computer stopped booting... I paid $1k to get the logic board replaced, and the computer crashed two weeks later... Then it was replaced again (at no additional cost) and it crashed again... Then it went for a third replacement, but they only reseted PRAM and sent it back non-working, so it went back for the fourth time... After the third replacement it seems to be working fine...
Should I be spending more time keeping my finger crossed???
You shouldn't have spent $1,000 originally to fix a 2 year old laptop.